A Late Day Gallop

I frequently use galloping horses for lens autofocus testing as they are challenging for the camera, lens - and me. The Canon EF 600mm f/4 L IS II USM Lens is very impressive in its AF capabilities - and is able to track the speeding horse until only half of the rider fits in the frame.
Camera and Lens Settings
600mm  f/4.0  1/1600s
ISO 250
3840 x 5760px
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